Chore: Port over Settings (Barely Works)

src/lib/components/chrome/titlebarOs.ts

@@ -0,0 +1,14 @@
+export type OsKind = 'macos' | 'windows' | 'linux' | 'unknown'
+
+export async function detectOs(): Promise<OsKind> {
+  try {
+    const { platform } = await import('@tauri-apps/plugin-os')
+    const p = await platform()
+    if (p === 'macos')   return 'macos'
+    if (p === 'windows') return 'windows'
+    if (p === 'linux')   return 'linux'
+    return 'unknown'
+  } catch {
+    return 'unknown'
+  }
+}